[U-Boot] [PATCH 32/42] board: freescale: ls1021atwr: support dm_i2c_* API

[Biwen Li]

This supports dm_i2c_* API to fix compilation error
when enable CONFIG_DM_I2C as follows:
	- board/freescale/ls1021atwr/built-in.o: In function `ls1twr_program_regulator:
	  board/freescale/ls1021atwr/ls1021atwr.c:469: undefined reference to
	  `i2c_get_bus_num'
	  board/freescale/ls1021atwr/ls1021atwr.c:470: undefined reference to
	  `i2c_set_bus_num'
	  board/freescale/ls1021atwr/ls1021atwr.c:471: undefined reference to
	  `i2c_reg_read'
	  board/freescale/ls1021atwr/ls1021atwr.c:478: undefined reference to
	  `i2c_reg_write'
	  board/freescale/ls1021atwr/ls1021atwr.c:479: undefined reference to
	  `i2c_reg_write'
	  board/freescale/ls1021atwr/ls1021atwr.c:480: undefined reference to
	  `i2c_reg_write'
	  board/freescale/ls1021atwr/ls1021atwr.c:481: undefined reference to
	  `i2c_reg_write'
	  board/freescale/ls1021atwr/ls1021atwr.c:482: undefined reference to
	  `i2c_reg_write'
	  board/freescale/ls1021atwr/ls1021atwr.c:484: undefined reference to
	  `i2c_set_bus_num'`

Signed-off-by: Biwen Li <biwen.li at nxp.com>

board: freescale: ls1021atwr: remove waring unused variable i2c_bus

This removes waring: unused variable i2c_bus

Signed-off-by: Biwen Li <biwen.li at nxp.com>
---
 board/freescale/ls1021atwr/ls1021atwr.c | 26 ++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/board/freescale/ls1021atwr/ls1021atwr.c b/board/freescale/ls1021atwr/ls1021atwr.c
index fcf2ec9788..e48da1624b 100644
--- a/board/freescale/ls1021atwr/ls1021atwr.c
+++ b/board/freescale/ls1021atwr/ls1021atwr.c
@@ -458,14 +458,37 @@ void board_init_f(ulong dummy)
 /* program the regulator (MC34VR500) to support deep sleep */
 void ls1twr_program_regulator(void)
 {
-	unsigned int i2c_bus;
 	u8 i2c_device_id;
 
 #define LS1TWR_I2C_BUS_MC34VR500	1
 #define MC34VR500_ADDR			0x8
 #define MC34VR500_DEVICEID		0x4
 #define MC34VR500_DEVICEID_MASK		0x0f
+#ifdef CONFIG_DM_I2C
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(LS1TWR_I2C_BUS_MC34VR500, MC34VR500_ADDR,
+				      1, &dev);
+	if (ret) {
+		printf("%s: Cannot find udev for a bus %d\n", __func__,
+		       LS1TWR_I2C_BUS_MC34VR500);
+		return;
+	}
+	i2c_device_id = dm_i2c_reg_read(dev, 0x0) &
+					MC34VR500_DEVICEID_MASK;
+	if (i2c_device_id != MC34VR500_DEVICEID) {
+		printf("The regulator (MC34VR500) does not exist. The device does not support deep sleep.\n");
+		return;
+	}
 
+	dm_i2c_reg_write(dev, 0x31, 0x4);
+	dm_i2c_reg_write(dev, 0x4d, 0x4);
+	dm_i2c_reg_write(dev, 0x6d, 0x38);
+	dm_i2c_reg_write(dev, 0x6f, 0x37);
+	dm_i2c_reg_write(dev, 0x71, 0x30);
+#else
+	unsigned int i2c_bus;
 	i2c_bus = i2c_get_bus_num();
 	i2c_set_bus_num(LS1TWR_I2C_BUS_MC34VR500);
 	i2c_device_id = i2c_reg_read(MC34VR500_ADDR, 0x0) &
@@ -482,6 +505,7 @@ void ls1twr_program_regulator(void)
 	i2c_reg_write(MC34VR500_ADDR, 0x71, 0x30);
 
 	i2c_set_bus_num(i2c_bus);
+#endif
 }
 #endif
 
-- 
2.17.1